diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index 7e68537..bc7b8b1 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -9,14 +9,14 @@
           <set>
             <option value="$PROJECT_DIR$" />
             <option value="$PROJECT_DIR$/TagViewGroupLibrary" />
-            <option value="$PROJECT_DIR$/app" />
+            <option value="$PROJECT_DIR$/sample" />
           </set>
         </option>
         <option name="myModules">
           <set>
             <option value="$PROJECT_DIR$" />
             <option value="$PROJECT_DIR$/TagViewGroupLibrary" />
-            <option value="$PROJECT_DIR$/app" />
+            <option value="$PROJECT_DIR$/sample" />
           </set>
         </option>
       </GradleProjectSettings>
diff --git a/.idea/misc.xml b/.idea/misc.xml
index 0f7a46d..6d03ef5 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -44,7 +44,7 @@
     <ConfirmationsSetting value="0" id="Add" />
     <ConfirmationsSetting value="0" id="Remove" />
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" default="true" assert-keyword="true" jdk-15="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" assert-keyword="true" jdk-15="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">
diff --git a/.idea/modules.xml b/.idea/modules.xml
index 8481fa9..4152be9 100644
--- a/.idea/modules.xml
+++ b/.idea/modules.xml
@@ -4,7 +4,7 @@
     <modules>
       <module fileurl="file://$PROJECT_DIR$/TagViewGroup.iml" filepath="$PROJECT_DIR$/TagViewGroup.iml" />
       <module fileurl="file://$PROJECT_DIR$/TagViewGroupLibrary/TagViewGroupLibrary.iml" filepath="$PROJECT_DIR$/TagViewGroupLibrary/TagViewGroupLibrary.iml" />
-      <module fileurl="file://$PROJECT_DIR$/app/app.iml" filepath="$PROJECT_DIR$/app/app.iml" />
+      <module fileurl="file://$PROJECT_DIR$/sample/app.iml" filepath="$PROJECT_DIR$/sample/app.iml" />
     </modules>
   </component>
 </project>
\ No newline at end of file
diff --git a/app/.gitignore b/sample/.gitignore
similarity index 100%
rename from app/.gitignore
rename to sample/.gitignore
diff --git a/app/build.gradle b/sample/build.gradle
similarity index 100%
rename from app/build.gradle
rename to sample/build.gradle
diff --git a/app/proguard-rules.pro b/sample/proguard-rules.pro
similarity index 100%
rename from app/proguard-rules.pro
rename to sample/proguard-rules.pro
diff --git a/app/src/androidTest/java/wang/yuchao/android/library/view/demo/tagviewgroup/ApplicationTest.java b/sample/src/androidTest/java/wang/yuchao/android/library/view/sample/tagviewgroup/ApplicationTest.java
similarity index 83%
rename from app/src/androidTest/java/wang/yuchao/android/library/view/demo/tagviewgroup/ApplicationTest.java
rename to sample/src/androidTest/java/wang/yuchao/android/library/view/sample/tagviewgroup/ApplicationTest.java
index c705c75..8b1b8fe 100644
--- a/app/src/androidTest/java/wang/yuchao/android/library/view/demo/tagviewgroup/ApplicationTest.java
+++ b/sample/src/androidTest/java/wang/yuchao/android/library/view/sample/tagviewgroup/ApplicationTest.java
@@ -1,4 +1,4 @@
-package wang.yuchao.android.library.view.demo.tagviewgroup;
+package wang.yuchao.android.library.view.sample.tagviewgroup;
 
 import android.app.Application;
 import android.test.ApplicationTestCase;
diff --git a/app/src/main/AndroidManifest.xml b/sample/src/main/AndroidManifest.xml
similarity index 76%
rename from app/src/main/AndroidManifest.xml
rename to sample/src/main/AndroidManifest.xml
index f05d503..27bb765 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/sample/src/main/AndroidManifest.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest package="wang.yuchao.android.library.view.demo.tagviewgroup"
+<manifest package="wang.yuchao.android.library.view.sample.tagviewgroup"
           xmlns:android="http://schemas.android.com/apk/res/android">
 
     <application
@@ -8,7 +8,7 @@
         android:label="@string/app_name"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
-        <activity android:name=".MainActivity">
+        <activity android:name="wang.yuchao.android.library.view.sample.tagviewgroup.MainActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
 
diff --git a/app/src/main/java/wang/yuchao/android/library/view/demo/tagviewgroup/ButtonTagViewGroup.java b/sample/src/main/java/wang/yuchao/android/library/view/sample/tagviewgroup/ButtonTagViewGroup.java
similarity index 94%
rename from app/src/main/java/wang/yuchao/android/library/view/demo/tagviewgroup/ButtonTagViewGroup.java
rename to sample/src/main/java/wang/yuchao/android/library/view/sample/tagviewgroup/ButtonTagViewGroup.java
index 82fce86..c9f9367 100644
--- a/app/src/main/java/wang/yuchao/android/library/view/demo/tagviewgroup/ButtonTagViewGroup.java
+++ b/sample/src/main/java/wang/yuchao/android/library/view/sample/tagviewgroup/ButtonTagViewGroup.java
@@ -1,4 +1,4 @@
-package wang.yuchao.android.library.view.demo.tagviewgroup;
+package wang.yuchao.android.library.view.sample.tagviewgroup;
 
 import android.content.Context;
 import android.util.AttributeSet;
diff --git a/app/src/main/java/wang/yuchao/android/library/view/demo/tagviewgroup/CheckBoxTagViewGroup.java b/sample/src/main/java/wang/yuchao/android/library/view/sample/tagviewgroup/CheckBoxTagViewGroup.java
similarity index 94%
rename from app/src/main/java/wang/yuchao/android/library/view/demo/tagviewgroup/CheckBoxTagViewGroup.java
rename to sample/src/main/java/wang/yuchao/android/library/view/sample/tagviewgroup/CheckBoxTagViewGroup.java
index e87de55..79efbca 100644
--- a/app/src/main/java/wang/yuchao/android/library/view/demo/tagviewgroup/CheckBoxTagViewGroup.java
+++ b/sample/src/main/java/wang/yuchao/android/library/view/sample/tagviewgroup/CheckBoxTagViewGroup.java
@@ -1,4 +1,4 @@
-package wang.yuchao.android.library.view.demo.tagviewgroup;
+package wang.yuchao.android.library.view.sample.tagviewgroup;
 
 import android.content.Context;
 import android.util.AttributeSet;
diff --git a/app/src/main/java/wang/yuchao/android/library/view/demo/tagviewgroup/MainActivity.java b/sample/src/main/java/wang/yuchao/android/library/view/sample/tagviewgroup/MainActivity.java
similarity index 98%
rename from app/src/main/java/wang/yuchao/android/library/view/demo/tagviewgroup/MainActivity.java
rename to sample/src/main/java/wang/yuchao/android/library/view/sample/tagviewgroup/MainActivity.java
index 840a8dd..f877b95 100644
--- a/app/src/main/java/wang/yuchao/android/library/view/demo/tagviewgroup/MainActivity.java
+++ b/sample/src/main/java/wang/yuchao/android/library/view/sample/tagviewgroup/MainActivity.java
@@ -1,4 +1,4 @@
-package wang.yuchao.android.library.view.demo.tagviewgroup;
+package wang.yuchao.android.library.view.sample.tagviewgroup;
 
 import android.os.Bundle;
 import android.support.v4.app.FragmentActivity;
diff --git a/app/src/main/res/drawable/tag_view_group_default_button.xml b/sample/src/main/res/drawable/tag_view_group_default_button.xml
similarity index 100%
rename from app/src/main/res/drawable/tag_view_group_default_button.xml
rename to sample/src/main/res/drawable/tag_view_group_default_button.xml
diff --git a/app/src/main/res/drawable/tag_view_group_default_checkbox.xml b/sample/src/main/res/drawable/tag_view_group_default_checkbox.xml
similarity index 100%
rename from app/src/main/res/drawable/tag_view_group_default_checkbox.xml
rename to sample/src/main/res/drawable/tag_view_group_default_checkbox.xml
diff --git a/app/src/main/res/layout/activity_main.xml b/sample/src/main/res/layout/activity_main.xml
similarity index 95%
rename from app/src/main/res/layout/activity_main.xml
rename to sample/src/main/res/layout/activity_main.xml
index 4bac83e..9258f27 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/sample/src/main/res/layout/activity_main.xml
@@ -40,7 +40,7 @@
                 android:layout_margin="@dimen/margin_normal"
                 android:text="占位"/>
 
-            <wang.yuchao.android.library.view.demo.tagviewgroup.ButtonTagViewGroup
+            <wang.yuchao.android.library.view.sample.tagviewgroup.ButtonTagViewGroup
                 android:id="@+id/button_tags_view_group"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
@@ -68,7 +68,7 @@
             android:layout_height="1px"
             android:background="@android:color/darker_gray"/>
 
-        <wang.yuchao.android.library.view.demo.tagviewgroup.CheckBoxTagViewGroup
+        <wang.yuchao.android.library.view.sample.tagviewgroup.CheckBoxTagViewGroup
             android:id="@+id/checkbox_tags_view_group"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
@@ -93,7 +93,7 @@
             android:layout_height="1px"
             android:background="@android:color/darker_gray"/>
 
-        <wang.yuchao.android.library.view.demo.tagviewgroup.CheckBoxTagViewGroup
+        <wang.yuchao.android.library.view.sample.tagviewgroup.CheckBoxTagViewGroup
             android:id="@+id/checkbox_radio_tags_view_group"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
diff --git a/app/src/main/res/layout/tag_view_group_default_button.xml b/sample/src/main/res/layout/tag_view_group_default_button.xml
similarity index 100%
rename from app/src/main/res/layout/tag_view_group_default_button.xml
rename to sample/src/main/res/layout/tag_view_group_default_button.xml
diff --git a/app/src/main/res/layout/tag_view_group_default_check_box.xml b/sample/src/main/res/layout/tag_view_group_default_check_box.xml
similarity index 100%
rename from app/src/main/res/layout/tag_view_group_default_check_box.xml
rename to sample/src/main/res/layout/tag_view_group_default_check_box.xml
diff --git a/app/src/main/res/mipmap-hdpi/ic_launcher.png b/sample/src/main/res/mipmap-hdpi/ic_launcher.png
similarity index 100%
rename from app/src/main/res/mipmap-hdpi/ic_launcher.png
rename to sample/src/main/res/mipmap-hdpi/ic_launcher.png
diff --git a/app/src/main/res/mipmap-mdpi/ic_launcher.png b/sample/src/main/res/mipmap-mdpi/ic_launcher.png
similarity index 100%
rename from app/src/main/res/mipmap-mdpi/ic_launcher.png
rename to sample/src/main/res/mipmap-mdpi/ic_launcher.png
diff --git a/app/src/main/res/mipmap-xhdpi/ic_launcher.png b/sample/src/main/res/mipmap-xhdpi/ic_launcher.png
similarity index 100%
rename from app/src/main/res/mipmap-xhdpi/ic_launcher.png
rename to sample/src/main/res/mipmap-xhdpi/ic_launcher.png
diff --git a/app/src/main/res/mipmap-xxhdpi/ic_launcher.png b/sample/src/main/res/mipmap-xxhdpi/ic_launcher.png
similarity index 100%
rename from app/src/main/res/mipmap-xxhdpi/ic_launcher.png
rename to sample/src/main/res/mipmap-xxhdpi/ic_launcher.png
diff --git a/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png b/sample/src/main/res/mipmap-xxxhdpi/ic_launcher.png
similarity index 100%
rename from app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
rename to sample/src/main/res/mipmap-xxxhdpi/ic_launcher.png
diff --git a/app/src/main/res/values/colors.xml b/sample/src/main/res/values/colors.xml
similarity index 100%
rename from app/src/main/res/values/colors.xml
rename to sample/src/main/res/values/colors.xml
diff --git a/app/src/main/res/values/dimens.xml b/sample/src/main/res/values/dimens.xml
similarity index 100%
rename from app/src/main/res/values/dimens.xml
rename to sample/src/main/res/values/dimens.xml
diff --git a/app/src/main/res/values/strings.xml b/sample/src/main/res/values/strings.xml
similarity index 100%
rename from app/src/main/res/values/strings.xml
rename to sample/src/main/res/values/strings.xml
diff --git a/app/src/main/res/values/styles.xml b/sample/src/main/res/values/styles.xml
similarity index 100%
rename from app/src/main/res/values/styles.xml
rename to sample/src/main/res/values/styles.xml
diff --git a/app/src/test/java/wang/yuchao/android/library/view/demo/tagviewgroup/ExampleUnitTest.java b/sample/src/test/java/wang/yuchao/android/library/view/sample/tagviewgroup/ExampleUnitTest.java
similarity index 82%
rename from app/src/test/java/wang/yuchao/android/library/view/demo/tagviewgroup/ExampleUnitTest.java
rename to sample/src/test/java/wang/yuchao/android/library/view/sample/tagviewgroup/ExampleUnitTest.java
index 4659f19..193d9f4 100644
--- a/app/src/test/java/wang/yuchao/android/library/view/demo/tagviewgroup/ExampleUnitTest.java
+++ b/sample/src/test/java/wang/yuchao/android/library/view/sample/tagviewgroup/ExampleUnitTest.java
@@ -1,4 +1,4 @@
-package wang.yuchao.android.library.view.demo.tagviewgroup;
+package wang.yuchao.android.library.view.sample.tagviewgroup;
 
 import org.junit.Test;
 
diff --git a/settings.gradle b/settings.gradle
index 0b48007..a81d103 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -1 +1 @@
-include ':app', ':TagViewGroupLibrary'
+include ':sample', ':TagViewGroupLibrary'